... or any other sugar:
Sugar makes you stupid, literally:
High-carb diet is linked to early Alzheimer's. Carbohydrates are a complex form of sugar. In digestion carbs, whether complex carbs or simple carbs, are broken down chemically into sugars and then metabolized. More on the link with Alzheimer's here. The link is so strong that the NY Times asks, "Is Alzheimer’s Type 3 Diabetes?"
But not just middle-aged and older adults should eschew sugar- and carb-rich diets. So should children since such diets are directly the cause of obesity and poor school performance because sugar makes you stupid. Also, see Science Daily on the subject.
Now, order and read this book: